
  .syntax unified
  .cpu cortex-m0
  .thumb

.global  g_pfnVectors
.global  Default_Handler

/* start address for the initialization values of the .data section.
defined in linker script */
.word  _sidata
/* start address for the .data section. defined in linker script */
.word  _sdata
/* end address for the .data section. defined in linker script */
.word  _edata
/* start address for the .bss section. defined in linker script */
.word  _sbss
/* end address for the .bss section. defined in linker script */
.word  _ebss
/* stack used for SystemInit_ExtMemCtl// always internal RAM used */

/**
 * @brief  This is the code that gets called when the processor first
 *          starts execution following a reset event. Only the absolutely
 *          necessary set is performed, after which the application
 *          supplied main() routine is called.
 * @param  None
 * @retval None
*/

    .section  .text.Reset_Handler
  .weak  Reset_Handler
  .type  Reset_Handler, %function
Reset_Handler:

/* Copy the data segment initializers from flash to SRAM */
  movs  r1, #0
  b  LoopCopyDataInit

CopyDataInit:
  ldr  r3, =_sidata
  ldr  r3, [r3, r1]
  str  r3, [r0, r1]
  adds  r1, r1, #4

LoopCopyDataInit:
  ldr  r0, =_sdata
  ldr  r3, =_edata
  adds  r2, r0, r1
  cmp  r2, r3
  bcc  CopyDataInit
  ldr  r2, =_sbss
  b  LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
  movs  r3, #0
  str  r3, [r2]
  adds r2,r2,#4

LoopFillZerobss:
  ldr  r3, = _ebss
  cmp  r2, r3
  bcc  FillZerobss

/* Call the clock system intitialization function.*/
  bl  SystemInit
/* Call static constructors */
  bl __libc_init_array
/* Call the application's entry point.*/
  bl  main
  bx  lr
.size  Reset_Handler, .-Reset_Handler

/**
 * @brief  This is the code that gets called when the processor receives an
 *         unexpected interrupt.  This simply enters an infinite loop, preserving
 *         the system state for examination by a debugger.
 * @param  None
 * @retval None
*/
    .section  .text.Default_Handler,"ax",%progbits
Default_Handler:
Infinite_Loop:
  b  Infinite_Loop
  .size  Default_Handler, .-Default_Handler
/******************************************************************************
*
* The minimal vector table for a Cortex M3. Note that the proper constructs
* must be placed on this to ensure that it ends up at physical address
* 0x0000.0000.
*
*******************************************************************************/
   .section  .isr_vector,"a",%progbits
  .type  g_pfnVectors, %object
  .size  g_pfnVectors, .-g_pfnVectors


g_pfnVectors:
  .word  _estack
  .word  Reset_Handler
  .word  NMI_Handler
  .word  HardFault_Handler
  .word  0
  .word  0
  .word  0
  .word  0
  .word  0
  .word  0
  .word  0
  .word  SVC_Handler
  .word  0
  .word  0
  .word  PendSV_Handler
  .word  SysTick_Handler

  .word   WDT_IRQHandler     
  .word   LVD_IRQHandler     
  .word   RTC_IRQHandler     
  .word   FLASHRAM_IRQHandler
  .word   SYSCTRL_IRQHandler 
  .word   GPIOA_IRQHandler
  .word   GPIOB_IRQHandler
  .word   0               
  .word   0               
  .word   0               
  .word   0               
  .word   0               
  .word   ADC_IRQHandler  
  .word   ATIM_IRQHandler    
  .word   VC1_IRQHandler     
  .word   VC2_IRQHandler     
  .word   GTIM1_IRQHandler   
  .word   0                  
  .word   0                  
  .word   LPTIM_IRQHandler   
  .word   BTIM1_IRQHandler   
  .word   BTIM2_IRQHandler   
  .word   BTIM3_IRQHandler   
  .word   I2C1_IRQHandler    
  .word   0                  
  .word   SPI1_IRQHandler    
  .word   0                  
  .word   UART1_IRQHandler   
  .word   UART2_IRQHandler          
  .word   0                         
  .word   0                         
  .word   CLKFAULT_IRQHandler       

  .weak NMI_Handler
  .thumb_set NMI_Handler,Default_Handler

  .weak HardFault_Handler
  .thumb_set HardFault_Handler,Default_Handler

  .weak SVC_Handler
  .thumb_set SVC_Handler,Default_Handler

  .weak PendSV_Handler
  .thumb_set PendSV_Handler,Default_Handler

  .weak SysTick_Handler
  .thumb_set SysTick_Handler,Default_Handler

  .weak WDT_IRQHandler
  .thumb_set WDT_IRQHandler,Default_Handler

  .weak LVD_IRQHandler
  .thumb_set LVD_IRQHandler,Default_Handler

  .weak RTC_IRQHandler
  .thumb_set RTC_IRQHandler,Default_Handler

  .weak FLASHRAM_IRQHandler
  .thumb_set  FLASHRAM_IRQHandler,Default_Handler

  .weak SYSCTRL_IRQHandler
  .thumb_set SYSCTRL_IRQHandler,Default_Handler

  .weak GPIOA_IRQHandler
  .thumb_set GPIOA_IRQHandler,Default_Handler

  .weak GPIOB_IRQHandler
  .thumb_set GPIOB_IRQHandler,Default_Handler

  .weak ADC_IRQHandler
  .thumb_set ADC_IRQHandler,Default_Handler

  .weak ATIM_IRQHandler
  .thumb_set ATIM_IRQHandler,Default_Handler

  .weak VC1_IRQHandler
  .thumb_set VC1_IRQHandler,Default_Handler

  .weak VC2_IRQHandler
  .thumb_set VC2_IRQHandler,Default_Handler

  .weak LPTIM_IRQHandler
  .thumb_set LPTIM_IRQHandler,Default_Handler

  .weak BTIM1_IRQHandler
  .thumb_set BTIM1_IRQHandler,Default_Handler

  .weak BTIM2_IRQHandler
  .thumb_set BTIM2_IRQHandler,Default_Handler

  .weak BTIM3_IRQHandler
  .thumb_set BTIM3_IRQHandler,Default_Handler

  .weak I2C1_IRQHandler
  .thumb_set I2C1_IRQHandler,Default_Handler

  .weak SPI1_IRQHandler
  .thumb_set SPI1_IRQHandler,Default_Handler

  .weak UART1_IRQHandler
  .thumb_set UART1_IRQHandler,Default_Handler

  .weak UART2_IRQHandler
  .thumb_set UART2_IRQHandler,Default_Handler

  .weak CLKFAULT_IRQHandler
  .thumb_set  CLKFAULT_IRQHandler,Default_Handler
